Oxygen Therapy Practice Questions

Question 1

What is the primary measurement obtained from pulse oximetry in relation to arterial blood?

Accepted Answer

Oxygen saturation

Answer

Rate of flow

Answer

Blood volume

Answer

Blood coefficient

Question 2

Chronic lung disease in infancy is defined as

Accepted Answer

Need for supplemental oxygen at 36 weeks postmenstrual age

Answer

Tachypnoea > 50 breaths/ min within 1 week of birth

Answer

Presence of bilateral infiltrates on chest Xray for 2 weeks

Answer

Reticulogranular pattern on chest Xray for 6 weeks

Question 3

A 56-year-old male with COPD presents with worsening shortness of breath. ABG analysis shows PaO2 of 55 mmHg. Which physiological mechanism primarily contributes to his hypoxemia?

Accepted Answer

Ventilation-perfusion mismatch

Answer

Right-to-left shunt

Answer

Hypoventilation

Answer

Reduced inspired oxygen tension

Question 4

In which of the following conditions oxygen delivery is least to muscles?

Accepted Answer

Person with carbon monoxide poisoning

Answer

Marathon runner at sea level

Answer

Person inhaling 100 percent oxygen at the top of Mount Everest

Answer

Person with anemia at sea level

Question 5

Which of the following is the most effective diagnostic test to differentiate between central and peripheral cyanosis in a patient with hypoxia?

Accepted Answer

Arterial blood gas analysis

Answer

Pulse oximetry

Answer

Chest X-ray

Answer

Electrocardiogram

Question 6

What is the immediate emergency treatment for carbon monoxide (CO) poisoning?

Accepted Answer

High flow O2

Answer

5% CO2 inhalation

Answer

10% CO2 inhalation

Answer

Nitroglycerine

Question 7

Which is not an obvious advantage of high-flow nasal cannula (HFNC):

Accepted Answer

Hot and Humidification of air

Answer

Bypassing nasopharyngeal dead space

Answer

PEEP

Answer

Decreases need for intubation

Question 8

Hyperbaric Oxygen is not useful in

Accepted Answer

Vertigo

Answer

CO poisoning

Answer

Gas gangrene

Answer

Compartment syndrome

Question 9

When is oxygen effective during radiotherapy?

Accepted Answer

During and within microseconds of starting

Answer

Just before starting the therapy

Answer

After 5 minutes

Answer

After 10 minutes

Question 10

Which of the following methods is NOT recommended for resuscitating a newborn baby with a heart rate less than 60 beats per minute?

Accepted Answer

slapping the back

Answer

chest compression

Answer

oxygen therapy

Answer

tactile stimulation

Oxygen Therapy — MCQs

Oxygen Therapy — MCQs

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